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Contractors World

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Contractors World  - UK & Ireland
2014 Vol 4 No 4
 
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Crossrail Tunnels Enter Final Stages - Page 2 of 4

TBM, Ellie, begins final 900 m drive - the shortest but most complex tunnel due to adjacent rail system and the Rive Lee and River ThamesTBM, Ellie, begins final 900 m drive - the shortest but most complex tunnel due to adjacent rail system and the Rive Lee and River Thames

Crossrail will complete its rail tunnels next year when tunnel machines Elizabeth and Victoria, currently in Whitechapel, reach Farringdon in central London. Crossrail’s new rail tunnels are 83 per cent complete and the project remains on time and within budget.

Ellie has already successfully completed a tunnel from Pudding Mill Lane, near Stratford, to Stepney Green. The tunnel machine is 150 m long and 7.1 m in diameter and is staffed by teams of 20 people. The concrete and steel tunnel segments are made in Chatham, Kent and transported to Limmo by river barge.

Andrew Wolstenholme, Crossrail Chief Executive said:

Huge amounts of planning go into every tunnel drive, and this one is no different. We are deploying some of the world’s best engineering talent and machinery to safely build these new tunnels.

Ellie has already successfully completed a tunnel from Pudding Mill Lane, near Stratford, to Stepney Green. The tunnel machine is 150 m long and 7.1 m in diameter and is staffed by teams of 20 people. The concrete and steel tunnel segments are made in Chatham, Kent and transported to Limmo by river barge.

Joint Venture Dragados Sisk is constructing the eastern tunnels between Pudding Mill Lane and Stepney Green, Limmo Peninsula and Farringdon, and Victoria Dock Portal and Limmo.

Jessica Going Strong

Crossrail’s tunnel boring machine, Jessica, has completed a new train tunnel from Limmo Peninsula, near Canning Town, breaking into Victoria Dock Portal in east London.

The 1,000 tonne machine completed her 900 metre journey in just 9 weeks, travelling as far as 41 metres per day. It is Jessica’s second Crossrail tunnel drive, having already created one of the two tunnels forming the spur from Pudding Mill Lane near Stratford to Stepney Green.

With her work completed, unlike many tunnel boring machines in the past, she will not be buried in a tunnel. She is to be dismantled, with parts returned to manufacturer, Herrenknecht, for use on other tunnelling projects.

Jessica is also 150 m long and 7.1 m in diameter and was staffed by teams of 20 people. Tunnel segments were made in Chatham, Kent and transported to Limmo by river barge.

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